New sample script: List all lists, its folders and item count for given site #2576

Based on discussion here: https://twitter.com/jasoosterveld/status/1412442520139730950 a sample that list all doc libs in a site, and for each dob lib list all folders and their item count (recursively)

Sample: https://gist.githubusercontent.com/appieschot/c8f64dbb7657a315b4a1ffebbec098f0/raw/111ec32a2f36bf778e9d55f39e26c20787d16de8/doclibs.ps1